Someone who uses their i-Pod during social outings, often isolating him or herself from a group of friends by listening to music and/or using apps and igoring conversation or his or her companions completely.

Person 1: Ryan was such an i-Tard last night!
Person 2: Yeah,I know! He didnt say one word the whole night, all he did was play doodle jump.

One who continues to purchase items such as the ipod, and will be purchasing future items such as the iphone because they are mindless sheep. Instead of actually doing research on said items they will wander to the nearest best buy and fork out 400 dollars for an outdated ipod because they don't realize there are other options out there. The itard is so ignorant, that they will ask you if you have an ipod rather than asking if you have an mp3 player. Continuing this trend eventually itard's will believe that music spawns from ipods and owning anything else will be a strange and frightening experience for them.
Apple could bring back 8 tracks and these morons would still buy it.

itard: "Dude, what kind of ipod is that?"
Person with a brain: "It's not an ipod, its a zen, now get away from me you fucking heathen".

itard: "Dude, i can't wait for the iphone. Finally i can play music on my phone!".
Person 2 with a brain: "Yeah, phones have been doing that for about 3 years now. Now quit drooling and get back to making my fries".

iDiots that have bought in to the marketing campaign that everything Mac is superior. Additionally they remind the rest of us of their gullibility at every opportunity, droning on about how their iMac, iPod, iPhone works better and faster than any other device ever made.

Tim told me, again, how superior his iPhone is to every other phone ever made. iTard!

Someone who is a part of Apple's marketing scheme of false heterosexuality. Owning any Apple hardware automatically associates a person with this group of "gifted" individuals who can do nothing but talk about how great their useless, overpriced piece of shit is. iTards have no sense of reality and therefore often believe they aren't listening to Hanson on their iPod. Do not let any iTards touch electronics you own, as they will likely fuck it up within 5 minutes.
iTards are likely to not change their ways, as they are spending their parents' money to be affiliated with a group of douchebags, not to buy an actual product. The best way to take care of an iTard is to spit in their face.

iTard: Dude, I just spent two thousand dollars of my parents' money to buy an iPhone and Mac. Neither of them work, but now I feel so cool!